<template>
  <div class="flex justify-center items-center">
    <div class="slide-captcha">
      <div class="bg-img">
        <el-image :src="backgroundImg" />
        <div :class="verifyMsgClass" v-if="checked !== 0">
          <span v-if="checked === 1">{{ time }}s</span>
          {{ verifyMsg }}
        </div>
        <div class="refresh" @click="emits('refresh')">
          <el-icon><Refresh /></el-icon>
        </div>
        <span class="block">
          <el-image :src="blockImg" :style="{ left: blockLeft + 'px' }" />
        </span>
      </div>

      <div class="verify">
        <div class="verify-bar-area">
          <span class="verify-msg">{{ verifyText }}</span>

          <div :class="leftBarClass" :style="{ width: leftBarWidth + 'px' }">
            <div :class="blockClass" id="dragBlock" :style="{ left: blockLeft + 'px' }">
              <el-icon v-if="checked === 0"><ArrowRightBold /></el-icon>
              <el-icon v-if="checked === 1"><CircleCheckFilled /></el-icon>
              <el-icon v-if="checked === 2"><CircleCloseFilled /></el-icon>
            </div>
          </div>
        </div>
      </div>
    </div>
  </div>
</template>

<script setup>
// eslint-disable-next-line no-undef
import { onMounted, ref, watch } from "vue";
import { ArrowRightBold, CircleCheckFilled, CircleCloseFilled, Refresh } from "@element-plus/icons-vue";

// eslint-disable-next-line no-undef
const props = defineProps({
  bgImg: String,
  bkImg: String,
  result: Number,
});

const verifyText = ref("向右滑动完成验证");
const verifyMsg = ref("");
const verifyMsgClass = ref("verify-text success");
const blockClass = ref("verify-move-block");
const leftBarClass = ref("verify-left-bar");
const backgroundImg = ref("");
const blockImg = ref("");
const leftBarWidth = ref(0);
const blockLeft = ref(0);
const checked = ref(0);
const time = ref("");

watch(
  () => props.bgImg,
  (newVal) => {
    backgroundImg.value = newVal;
  }
);
watch(
  () => props.bkImg,
  (newVal) => {
    blockImg.value = newVal;
  }
);
watch(
  () => props.result,
  (newVal) => {
    checked.value = newVal;
    if (newVal === 1) {
      verifyMsgClass.value = "verify-text success";
      blockClass.value = "verify-move-block success";
      leftBarClass.value = "verify-left-bar success";
      verifyMsg.value = "验证成功";
      setTimeout(() => emits("hide"), 1000);
    } else if (newVal === 2) {
      verifyMsgClass.value = "verify-text error";
      blockClass.value = "verify-move-block error";
      leftBarClass.value = "verify-left-bar error";
      verifyMsg.value = "验证失败";
      setTimeout(() => {
        reset();
        emits("refresh");
      }, 1000);
    } else {
      reset();
    }
  }
);

// eslint-disable-next-line no-undef
const emits = defineEmits(["confirm", "refresh", "hide"]);

let offsetX = 0,
  isDragging = false;
let start = 0;
onMounted(() => {
  const dragBlock = document.getElementById("dragBlock");
  dragBlock.addEventListener("mousedown", (evt) => {
    blockClass.value = "verify-move-block active";
    leftBarClass.value = "verify-left-bar active";
    leftBarWidth.value = 32;
    isDragging = true;
    verifyText.value = "";
    offsetX = evt.clientX;
    start = new Date().getTime();
    evt.preventDefault();
  });

  document.body.addEventListener("mousemove", (evt) => {
    if (!isDragging) {
      return;
    }
    const x = Math.max(evt.clientX - offsetX, 0);
    blockLeft.value = x;
    leftBarWidth.value = x + 32;
  });

  document.body.addEventListener("mouseup", () => {
    if (!isDragging) {
      return;
    }
    time.value = ((new Date().getTime() - start) / 1000).toFixed(2);
    isDragging = false;
    emits("confirm", Math.floor(blockLeft.value));
  });

  // 触摸事件
  dragBlock.addEventListener("touchstart", function (e) {
    isDragging = true;
    blockClass.value = "verify-move-block active";
    leftBarClass.value = "verify-left-bar active";
    leftBarWidth.value = 32;
    isDragging = true;
    verifyText.value = "";
    offsetX = e.touches[0].clientX - dragBlock.getBoundingClientRect().left;
    start = new Date().getTime();
    e.preventDefault();
  });

  document.addEventListener("touchmove", function (e) {
    if (!isDragging) {
      return;
    }
    e.preventDefault();
    const x = Math.max(e.touches[0].clientX - offsetX, 0);
    blockLeft.value = x;
    leftBarWidth.value = x + 32;
  });

  document.addEventListener("touchend", function () {
    if (!isDragging) {
      return;
    }
    time.value = ((new Date().getTime() - start) / 1000).toFixed(2);
    isDragging = false;
    emits("confirm", Math.floor(blockLeft.value));
  });
});

// 重置验证码
const reset = () => {
  blockClass.value = "verify-move-block";
  leftBarClass.value = "verify-left-bar";
  leftBarWidth.value = 0;
  blockLeft.value = 0;
  checked.value = 0;
  verifyText.value = "向右滑动完成验证";
};
</script>

<style scoped lang="stylus">
@keyframes expandUp {
  0% {
    transform: scaleY(0);
  }
  100% {
    transform: scaleY(1);
  }
}

.slide-captcha {
  width 310px
  * {
    margin 0
    padding 0
  }

  .bg-img {
    position relative
    width 310px
    .verify-text {
      position absolute
      bottom 3px
      padding 5px 10px
      width 290px
      color #ffffff

      animation: expandUp 0.3s ease-in-out forwards;
      transform-origin: bottom center;
      transform: scaleY(0); /* 初始状态，元素高度为0 */
    }

    .verify-text.success {
      background-color rgba(92,184,92, 0.5)
    }

    .verify-text.error {
      background-color rgba(184,92,92, 0.5)
    }

    .refresh {
      position absolute
      right 5px
      top 5px
      font-size 20px
      cursor pointer
      color #ffffff
    }

    .block {
      position absolute
      top 0
      left 0
    }

  }

  .verify {
    .verify-bar-area {
      position relative
      border: 1px solid #dddddd
      overflow hidden
      height 34px

      .verify-msg {
        display flex
        line-height 32px
        width 100%
        justify-content center
      }

      .verify-left-bar {
        position absolute
        left 0
        top 0
        height 32px;

        .verify-move-block {
          position absolute
          width: 32px;
          height: 32px;
          background-color: rgb(255, 255, 255);
          border-top 1px solid #ffffff
          border-bottom 1px solid #ffffff
          border-right 1px solid #dddddd

          display flex
          justify-content center
          align-items center
          .el-icon {
            font-size 20px
            cursor pointer
          }
        }

        .verify-move-block.active {
          background #409eff
          color #ffffff
          border 1px solid #409eff
        }

        .verify-move-block.success {
          background #57AD57
          color #ffffff
          border 1px solid #57AD57
        }
        .verify-move-block.error {
          background #D9534F
          color #ffffff
          border 1px solid #D9534F
        }

      }

      .verify-left-bar.active {
        background-color #F0FFF0
        border 1px solid #409eff
      }
      .verify-left-bar.success {
        background-color #F0FFF0
        border 1px solid #57AD57
      }
      .verify-left-bar.error {
        background-color #F0FFF0
        border 1px solid #D9534F
      }
    }
  }
}
</style>
